Increase PST/OST File size in Outlook

By default these limits are 50GB. To increase these to 100GB modify/create a GPO to set the following values:

User Configuration-> Administrative Templates-> Microsoft Outlook -> Miscellaneous-> PST Settings

The following 2 settings need to be modified:
- Large PST: Absolute maximum size: 100000
- Large PST: Size to disable adding new content: 95000